Telescopic rod structure and lawn mower

Abstract

The utility model relates to the technical field of mowing equipment, and particularly discloses a telescopic rod structure and a lawn mower, the mowing equipment comprises an inner rod, an outer rod, a shell, an operation piece, a linkage piece and a switch assembly, the operation piece is installed on the shell, the operation piece is partially exposed out of the shell, and the operation piece has a first operation state and a second operation state; the linkage part is matched with the operation part and used for controlling the operation part to be switched between a first operation state and a second operation state; the telescopic matching state between the inner rod and the outer rod can be known by observing whether the operation piece is in the first operation state or the second operation state, and more convenience and intuition are achieved; in addition, through cooperation of the linkage piece, the switch assembly and the operation piece, the structure is simpler and more reliable, the service life is long, meanwhile, due to the fact that a trigger piece in the switch assembly is triggered through telescopic movement of the inner rod, influences of the operation piece and the linkage piece are avoided, and safety and reliability are higher.

Description

Technical Field

[0001] The present application relates to the technical field of lawn mowing equipment, and in particular to a telescopic rod structure and a lawn mower. Background Art

[0002] A lawn mower is a mechanical device for mowing grass and a greening and environmental protection device that can cut grass and weeds in gardens. Generally, a lawn mower consists of a cutter disc, an engine, a running wheel, a running mechanism, a blade, an armrest, and a control part.

[0003] To ensure operator safety, lawn mowers often feature long handles, allowing operators to stay away from the cutterhead during operation. Furthermore, to facilitate transport and storage, lawn mower handles are typically retractable. Furthermore, to further ensure operator safety, safety controls are often incorporated into the handles. However, existing lawn mowers lack a locking mechanism, allowing the mower to be started even after the handles are fully extended. This can easily lead to misoperation and poses a safety hazard.

[0004] In the related art, there is a method of controlling the extension and retraction of the brake lever by pulling and rotating a knob to switch the non-circular hole and the connecting portion between correspondence and non-correspondence. This solution is relatively complex because the non-circular hole and the connecting portion need to be controlled by pulling and rotating the knob, and it is difficult for the operator to intuitively distinguish the extension and retraction of the brake lever. Utility Model Content

[0005] The purpose of the utility model is to solve the defects of the prior art and provide a telescopic rod structure and a lawn mower.

[0006] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0007] A telescopic rod structure, comprising an inner rod and an outer rod, wherein the inner rod is sleeved in an inner cavity of the outer rod and the inner rod is axially telescopically movable relative to the outer rod. The telescopic rod structure further comprises:

[0008] A housing, the housing being fixedly mounted on the periphery of the outer rod;

[0009] an operating member, the operating member being mounted on the housing, the operating member being partially exposed to the outside of the housing, and the operating member having a first operating state and a second operating state;

[0010] a linkage member, the linkage member cooperating with the operating member to control the operating member to switch between a first operating state and a second operating state;

[0011] a switch assembly, the switch assembly being disposed in the housing;

[0012] When the operating member is in the second operating state, the linkage member controls the operating member to approach the outer rod, at which time the inner rod is in a non-retractable state and the switch assembly is in a conducting state;

[0013] When the operating member is in the first operating state, the linkage member controls the operating member to move away from the outer rod. At this time, the inner rod is in a retractable state, and the switch assembly is in an off state.

[0014] Furthermore, the operating part includes a pressing part, a limiting part and a stop part. The limiting part is slidably installed on the inner wall of the shell. The limiting part forms a sliding connection with the inside of the shell parallel to the pressing direction of the pressing part. One end of the pressing part extends to the periphery of the shell, and the other end of the pressing part is fixedly connected to the stop part through the limiting part. The inner rod and the outer rod are respectively provided with a first positioning hole that is tightly fitted with the stop part.

[0015] Furthermore, the operating member further includes a return spring, and the return spring is sleeved on the outer surface of the stop portion.

[0016] Furthermore, the linkage member includes a positioning end and a sliding end that are relatively arranged. The positioning end is installed on the shell, and the sliding end can rotate relative to the shell around the positioning end. The sliding end is slidably installed on the limiting portion to control the operating member to switch between the first operating state and the second operating state.

[0017] Furthermore, the end surface of the limiting portion is provided with a first limiting groove, a second limiting groove, a third limiting groove and a fourth limiting groove which are connected end to end in sequence, wherein when the pressing portion is pressed so that the operating member is in the first operating state, the sliding end slides along the first limiting groove and the second limiting groove to the third limiting groove and is clamped; when the pressing portion is pressed again so that the operating member is in the second operating state, the sliding end slides from the third limiting groove to the first limiting groove.

[0018] Furthermore, the first limiting groove, the second limiting groove, the third limiting groove and the fourth limiting groove are arc-shaped groove structures, the first limiting groove and the third limiting groove are arranged opposite to each other, the second limiting groove and the fourth limiting groove are arranged opposite to each other, the first limiting groove and the third limiting groove are arc-shaped groove structures with the groove opening facing the side of the pressing part, and the second limiting groove and the fourth limiting groove are arc-shaped groove structures with the groove opening facing the side of the linkage part.

[0019] Furthermore, the switch assembly includes a trigger member and a safety switch, the safety switch is fixedly mounted on the inner wall of the shell, and the trigger member cooperates with the safety switch; wherein when the operating member is in the second operating state, the safety switch is in the on state; when the operating member is in the first operating state, the safety switch is in the off state.

[0020] Furthermore, the trigger member includes a fixed end, a first interference end and a second interference end arranged in an approximately triangular shape, the fixed end is rotatably hingedly mounted on the inner wall of the shell, the first interference end and the second interference end can rotate relative to the fixed end, the first interference end is arranged adjacent to one side of the outer rod, the outer rod and the inner rod are respectively provided with a second positioning hole for the first interference end to cooperate and clamp, the second interference end is arranged adjacent to one side of the safety switch, and is used to control the on or off state of the safety switch.

[0021] Furthermore, a limiting sleeve is snap-fitted on the outer surface of the bottom end of the inner rod, and a stop sleeve is snap-fitted on the outer surface of the top end of the outer rod. The top end of the limiting sleeve cooperates with the bottom end of the stop sleeve to prevent the inner rod from slipping out of the inner cavity of the outer rod.

[0022] The telescopic rod structure provided by the present application has the following beneficial technical effects compared with the prior art:

[0023] 1. By observing whether the operating member is in the first operating state or the second operating state, the telescopic cooperation state between the inner rod and the outer rod can be known, which is more convenient and intuitive;

[0024] 2. By adopting the coordination between the linkage parts, the switch assembly and the operating parts, the structure is simpler and more reliable, and the service life is long. At the same time, since the trigger part in the switch assembly is triggered by the telescopic movement of the inner rod, it is not affected by the operating parts and the linkage parts, and it is safer and more reliable.

[0025] Another technical solution adopted in the present application is: a lawn mower, which includes a lawn mower body, and the lawn mower also includes a telescopic rod structure as described above, wherein the bottom end of the outer rod is fixedly mounted on the lawn mower body, and the switch assembly is electrically connected to a controller in the lawn mower body for controlling the start of a mowing motor.

[0026] Through the above technical solution, the lawn mower provided by the present application has the technical effects of the above telescopic rod structure because it is equipped with the above telescopic rod structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] Figure 1 This is a schematic diagram of the three-dimensional structure of a lawn mower according to an embodiment of the present application;

[0029] Figure 2 for Figure 1 A local enlarged structural diagram in FIG.

[0030] Figure 3 This is a schematic diagram of the structure of the inner rod and the outer rod in the embodiment of the present application;

[0031] Figure 4 Schematic diagram of the cooperation structure between the limiting sleeve on the inner rod and the stop sleeve on the outer rod in an embodiment of the present application;

[0032] Figure 5 Schematic diagram of the installation position structure of the operating member, linkage member and switch assembly inside the housing in the embodiment of the present application;

[0033] Figure 6 This is a structural diagram of the linkage member installed on the operating member in the embodiment of the present application;

[0034] Figure 7 This is a schematic diagram of the operating member structure in an embodiment of the present application;

[0035] Figure 8 Schematic diagram of the switch assembly structure in an embodiment of the present application;

[0036] Figure 9 Schematic diagram of the trajectory of the sliding end of the linkage member sliding on the limiting portion in the embodiment of the present application. DETAILED DESCRIPTION

[0037] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0038] Reference Figure 1 , attached Figure 2 And attached Figure 4 To the attached Figure 8As shown, this embodiment provides a lawn mower 10, which includes a lawn mower body 100 and a telescopic rod structure 200. The telescopic rod structure 200 includes an inner rod 201, an outer rod 202, a housing, an operating member 204, a linkage member 210 and a switch assembly 209.

[0039] Refer to the attached Figure 1 and attached Figure 2 As shown, outer rods 202 are mounted on the left and right sides of the lawn mower body, respectively. The outer rods 202 are mounted on the lawn mower body at a certain angle. Specifically, the bottom end of the outer rod 202 is fixedly mounted on one side of the lawn mower body. The inner rod 201 is sleeved within the inner cavity of the outer rod 202 and can be telescopically moved along the inner cavity of the outer rod 202. The inner rod 201 and the outer rod 202 form the handle of the lawn mower, which facilitates the operator to safely operate the lawn mower for weeding operations.

[0040] Refer to the attached Figure 3 and attached Figure 4 As shown, a stop sleeve 208 is snap-fitted to the outer edge of the top end of the outer rod 202. Correspondingly, a limit sleeve 207 is snap-fitted to the outer surface of the bottom end of the inner rod 201. The limit sleeve 207 is arranged below the stop sleeve 208, and the limit sleeve 207 cooperates with the stop sleeve 208. When the inner rod 201 is pulled outward along the inner cavity of the outer rod 202, when the inner rod 201 reaches the maximum pulled-out length, the top of the limit sleeve 207 located on the outer surface of the bottom end of the inner rod 201 contacts and contacts the bottom of the stop sleeve 208 at the outer edge of the top end of the outer rod 202, restricting the inner rod 201 from continuing to move outward, thereby preventing the inner rod 201 from falling off from the inner cavity of the outer rod 202 during the process of extending outward.

[0041] Refer to the attached Figure 1 and attached Figure 2 As shown, the housing is detachably fixedly mounted at the junction of the outer rod 202 and the inner rod 201 , that is, near the top outer edge of the outer rod 202 .

[0042] Refer to the attached Figure 1 , Attachment Figure 2 And attached Figure 5 To the attached Figure 7 As shown, the operating member 204 is mounted on the housing, and a portion of the operating member 204 extends outside the housing, which facilitates the operator to operate the operating member 204, such as pressing the operating member 204. The operating member 204 has two operating states, namely a first operating state and a second operating state.

[0043] Refer to the attached Figure 2As shown, the operating member 204 at the left side is in the first operating state, in which the operating member 204 is in the original position, i.e., in the unpressed state, and the length of the operating member 204 extending outside the housing 203 is at its maximum. The operating member 204 at the right side is in the second operating state, in which the operating member 204 is in the pressed position, i.e., in the pressed state, and the length of the operating member 204 extending outside the housing 203 is at its minimum.

[0044] Refer to the attached Figure 5 To the attached Figure 8 As shown, the linkage member 210 and the switch assembly 209 are both disposed within the housing, and the linkage member 210 and the switch assembly 209 respectively correspond to the operating member 204 and the inner rod 201 and the outer rod 202. When the operating member 204 is in the second operating state, the linkage member 210 controls the operating member 204 to approach the outer rod 202, at which time the inner rod 201 is in a non-retractable state and the switch assembly 209 is in an on state. When the operating member 204 is in the first operating state, the linkage member 210 controls the operating member 204 to move away from the outer rod 202, at which time the inner rod 201 is in a retractable state and the switch assembly 209 is in an off state.

[0045] During use, the operator can intuitively and quickly know the telescopic cooperation state between the inner rod 201 and the outer rod 202 by directly operating the operating member 204 and observing the state of the operating member 204 at this time (whether it is in the first operating state or the second operating state), making the telescopic rod structure with the above structure more intuitive and convenient when used.

[0046] Refer to the attached Figure 7 As shown, specifically, in this embodiment, the operating member 204 includes a pressing portion 2042, a limiting portion 2041, a stopper 2043, and a return spring 2044. A receiving space for mounting the limiting portion 2041 is formed on the inner wall of the housing, and the limiting portion 2041 and the receiving space form a sliding connection parallel to the pressing direction of the pressing portion 2042. The pressing portion 2042 has one end extending into the inner cavity of the housing fixedly connected to the limiting portion 2041, while the other end of the pressing portion 2042 extends to the outside of the housing, facilitating an operator's pressing operation.

[0047] Continue to refer to the attached Figure 7 As shown, one end of the stopper 2043 is fixedly connected to the limiting portion 2041, and the other end of the stopper 2043 extends horizontally outward to cooperate with the first positioning hole 205 formed on the inner rod 201 and the outer rod 202 to lock the inner rod 201 and the outer rod 202. A return spring 2044 is sleeved on the outer surface of the stopper 2043 to facilitate the rebound and return of the pressing portion 2042.

[0048] In some embodiments, the pressing portion 2042 , the limiting portion 2041 , and the stopping portion 2043 may be integrally formed, or may be individually manufactured and then fixedly connected together, without limitation.

[0049] When the operator applies force to the pressing part 2042, the force acting on the pressing part 2042 will be directly transmitted to the limiting part 2041, thereby pushing the limiting part 2041 to slide along the inner wall of the shell. The limiting part 2041 in the sliding state will then synchronously drive the stop part 2043 to move back and forth so as to be inserted into the first positioning hole 205 or pulled out from the first positioning hole 205.

[0050] Combined with reference to Figure 4 , Attachment Figure 5 And attached Figure 7 As shown, the first positioning hole 205 on the inner rod 201 is set at the bottom end of the inner rod 201, such as being set on the limit sleeve 207 at the bottom end of the inner rod 201; and the first positioning hole 205 on the outer rod 202 is set near the top end of the outer rod 202, that is, after the inner rod 201 is extended outward along the inner cavity of the outer rod 202, the inner rod 201 and the first positioning holes 205 on the outer rod 202 coincide with each other, so that after the stop portion 2043 is inserted into the first positioning hole 205, the inner rod 201 and the outer rod 202 can be locked, preventing the inner rod 201 from telescopically moving along the outer rod 202.

[0051] Refer to the attached Figure 5 , Attachment Figure 6 And attached Figure 9 As shown, linkage member 210 cooperates with operating member 204 to control the switching of operating member 204 between a first operating state and a second operating state. Through the cooperation between linkage member 210 and operating member 204, operating member 204 can automatically switch between the first operating state and the second operating state under the action of an external force. Furthermore, the switching of operating member 204 is achieved through the mechanical structure between operating member 204 and linkage member 210, which provides a more reliable structure and a longer service life.

[0052] For details, please refer to the attached Figure 5 , Attachment Figure 6 And attached Figure 9As shown, the linkage member 210 includes a positioning end 2102 and a sliding end 2101 disposed at opposite ends. The positioning end 2102 is mounted on the housing, and the sliding end 2101 can rotate relative to the housing around the positioning end 2102. The sliding end 2101 is slidably mounted on the limiting portion 2041, and can slide around the positioning end 2102 along a preset trajectory on the end surface of the limiting portion 2041. That is, when the limiting portion 2041 slides along the inner wall of the housing, since the positioning end 2102 of the linkage member 210 is disposed on the inner wall of the housing, the sliding end 2101 of the linkage member 210 can only slide along the end surface of the limiting portion 2041.

[0053] Refer to the attached Figure 9 As described, four limiting grooves are formed on the end face of the limiting portion 2041, namely the first limiting groove a, the second limiting groove b, the third limiting groove c and the fourth limiting groove d. The four limiting grooves are basically designed to be concave arc-shaped to accommodate the sliding end 2101 of the linkage part 210.

[0054] Refer to the attached Figure 9 As shown, for ease of description, the direction of horizontal center movement of the operating member 204 is referred to as the X-axis direction. The first limiting groove a and the third limiting groove c are substantially located along the X-axis. The first limiting groove a is located at the right end of the X-axis, i.e., near the fixed end 20922 of the linkage member 210, while the third limiting groove c is located at the left end of the X-axis, i.e., near one end of the pressing portion 2042. The first limiting groove a and the third limiting groove c are arc-shaped groove structures with the groove opening concave toward the pressing portion 2042. The second limiting groove b is located below the X-axis and below the third limiting groove c. The fourth limiting groove d is located above the X-axis and above the third limiting groove c. The second limiting groove b and the fourth limiting groove d are arc-shaped groove structures with the groove opening concave toward the linkage member 210, i.e., the first limiting groove a and the third limiting groove c are located in the opposite direction of the second limiting groove b and the fourth limiting groove d.

[0055] Refer to the attached Figure 9 As shown, the first limiting groove a, the second limiting groove b, the third limiting groove c, and the fourth limiting groove d are connected end to end to form a circular layout design. This design facilitates the movement and reset of the sliding end 2101 along the limiting grooves. On the one hand, when the sliding end 2101 is in the second limiting groove b, it then slides along the inclined surface near the third limiting groove c to the third limiting groove c. On the other hand, it facilitates the sliding end 2101 to move from the third limiting groove c along the upper side of the sliding inclined surface to the fourth limiting groove d, and then reset to the first limiting groove a. Through the design of the limiting grooves on the limiting portion 2041 and the cooperation of the linkage member 210, the operating member 204 can be conveniently and stably switched between the first operating state and the second operating state.

[0056] Refer to the attached Figure 5and attached Figure 8 As shown, the switch assembly 209 includes a trigger 2092 and a safety switch 2091. The safety switch 2091 is fixedly mounted on the inner wall of the shell, and the safety switch 2091 is electrically connected to the controller in the lawn mower body for controlling the start of the mowing motor, and is used to provide a corresponding action signal to the controller.

[0057] Refer to the attached Figure 5 and attached Figure 8 As shown, the trigger member 2092 includes a fixed end 20922, a first abutting end 20921, and a second abutting end 20923. The fixed end 20922, the first abutting end 20921, and the second abutting end 20923 are arranged in a roughly triangular shape. The fixed end 20922 is hingedly mounted on the inner wall of the housing, forming a rotational connection with the inner wall of the housing, allowing the trigger member 2092 to rotate around the fixed end 20922. The first abutting end 20921 is positioned adjacent to one side of the outer rod 202 and abuts against the outer surface of the outer rod 202. The second abutting end 20923 is positioned adjacent to the safety switch 2091 and is used to control the on / off state of the safety switch 2091. The outer rod 202 and the inner rod 201 are each provided with a second positioning hole 206 for engaging and securing the first abutting end 20921. The second positioning hole 206 is located to one side of the first positioning hole 205.

[0058] When the inner rod 201 is pulled upward along the inner cavity of the outer rod 202 to its maximum length, the first positioning holes 205 on the inner rod 201 and the outer rod 202 are in an overlapping state, and the second positioning holes 206 thereon are also in an overlapping state. At this time, when the operator presses the pressing portion 2042, the pressing portion 2042 will drive the limiting portion 2041 and the stopping portion 2043 to move forward, so that the stopping portion 2043 is inserted into the first positioning hole 205 of the inner rod 201 and the outer rod 202, thereby locking the inner rod 201 and the outer rod 202; at the same time, since the second positioning hole 206 on the inner rod 201 and the outer rod 202 is also in a coincidence state at this time, the first contact end 20921 in the trigger member 2092 will automatically fit into the second positioning hole 206, that is, the first contact end 20921 will rotate toward the side of the outer rod 202, and the first contact end 20921 enters the second positioning hole 206, so that the trigger member 2092 as a whole automatically rotates toward the side of the outer rod 202. Therefore, the second contact end 20923 does not press the safety switch 2091, and the safety switch 2091 is in a conducting state. At this time, the operator can start the lawn mower through the controller.

[0059] In the process of the operator pressing the pressing part 2042 downward, the sliding end 2101 of the linkage 210 moves from the first limiting groove a to the second limiting groove b. When the operator releases the pressing part 2042, due to the action of the return spring 2044, the sliding end 2101 will move from the second limiting groove b to the third limiting groove c, ensuring that the pressing part 2042 will not automatically reset to the first limiting groove a under the action of the return spring 2044, thereby preventing the pressing part 2042 from accidentally resetting.

[0060] When the inner rod 201 is in a telescopic movable state, the inner rod 201 slides along the inner cavity of the outer rod 202, and the side wall of the inner rod 201 pushes the first contact end 20921 out of the second positioning hole 206 on the inner rod 201. At this time, the first contact end 20921 only extends into the second positioning hole 206 on the outer rod 202. Therefore, the trigger member 2092 will rotate around the fixed end 20922 toward the side of the safety switch 2091, so that the second contact end 20923 presses the safety switch 2091, and the safety switch 2091 is in the disconnected state. At this time, even if the operator triggers the start button of the lawn mower, the lawn mower cannot work to ensure the safety of the operator.

[0061] In this embodiment, the on / off state of the safety switch 2091 is controlled by utilizing whether the second contact end 20923 of the trigger member 2092 is in contact with the safety switch 2091 or not, and the action state of the second contact end 20923 in the trigger member 2092 is triggered by the telescopic movement of the inner rod 201 and the outer rod 202, and is not affected by the operating member 204 and the linkage member 210, which is safer and more reliable.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A telescopic rod structure, comprising an inner rod and an outer rod, wherein the inner rod is sleeved in an inner cavity of the outer rod, and the inner rod is axially telescopically movable relative to the outer rod, characterized in that: The telescopic rod structure also includes: A housing, the housing being fixedly mounted on the periphery of the outer rod; an operating member, the operating member being mounted on the housing, the operating member being partially exposed to the outside of the housing, and the operating member having a first operating state and a second operating state; a linkage member, the linkage member cooperating with the operating member to control the operating member to switch between a first operating state and a second operating state; a switch assembly, the switch assembly being disposed in the housing; When the operating member is in the second operating state, the linkage member controls the operating member to approach the outer rod, at which time the inner rod is in a non-retractable state and the switch assembly is in a conducting state; When the operating member is in the first operating state, the linkage member controls the operating member to move away from the outer rod. At this time, the inner rod is in a retractable state, and the switch assembly is in an off state.

2. The telescopic rod structure according to claim 1, characterized in that: The operating member includes a pressing portion, a limiting portion and a stop portion. The limiting portion is slidably mounted on the inner wall of the shell. The limiting portion forms a sliding connection with the inside of the shell parallel to the pressing direction of the pressing portion. One end of the pressing portion extends to the periphery of the shell, and the other end of the pressing portion is fixedly connected to the stop portion through the limiting portion. The inner rod and the outer rod are respectively provided with a first positioning hole that is tightly fitted with the stop portion.

3. The telescopic rod structure according to claim 2, characterized in that: The operating member further includes a return spring, and the return spring is sleeved on the outer surface of the stop portion.

4. The telescopic rod structure according to claim 3, characterized in that: The linkage member includes a positioning end and a sliding end that are relatively arranged. The positioning end is installed on the shell, and the sliding end can rotate relative to the shell around the positioning end. The sliding end is slidably installed on the limiting portion to control the operating member to switch between the first operating state and the second operating state.

5. The telescopic rod structure according to claim 4, characterized in that: The end surface of the limiting portion is provided with a first limiting groove, a second limiting groove, a third limiting groove and a fourth limiting groove which are connected end to end in sequence, wherein when the pressing portion is pressed so that the operating member is in the first operating state, the sliding end slides along the first limiting groove and the second limiting groove to the third limiting groove and is clamped; when the pressing portion is pressed again so that the operating member is in the second operating state, the sliding end slides from the third limiting groove to the first limiting groove.

6. The telescopic rod structure according to claim 5, characterized in that: The first limiting groove, the second limiting groove, the third limiting groove and the fourth limiting groove are arc-shaped groove structures, the first limiting groove and the third limiting groove are arranged opposite to each other, the second limiting groove and the fourth limiting groove are arranged opposite to each other, the first limiting groove and the third limiting groove are arc-shaped groove structures with the groove opening facing the side of the pressing part, and the second limiting groove and the fourth limiting groove are arc-shaped groove structures with the groove opening facing the side of the linkage part.

7. The telescopic rod structure according to claim 1, characterized in that: The switch assembly includes a trigger member and a safety switch, wherein the safety switch is fixedly mounted on the inner wall of the housing, and the trigger member cooperates with the safety switch; wherein when the operating member is in the second operating state, the safety switch is in the on state; and when the operating member is in the first operating state, the safety switch is in the off state.

8. The telescopic rod structure according to claim 7, characterized in that: The trigger member includes a fixed end, a first interference end and a second interference end arranged in an approximately triangular shape. The fixed end is rotatably hingedly mounted on the inner wall of the shell. The first interference end and the second interference end can rotate relative to the fixed end. The first interference end is arranged adjacent to one side of the outer rod. The outer rod and the inner rod are respectively provided with a second positioning hole for the first interference end to cooperate and clamp. The second interference end is arranged adjacent to one side of the safety switch for controlling the on or off state of the safety switch.

9. The telescopic rod structure according to claim 1, characterized in that: A limiting sleeve is snap-fitted on the outer surface of the bottom end of the inner rod, and a stop sleeve is snap-fitted on the outer surface of the top end of the outer rod. The top end of the limiting sleeve cooperates with the bottom end of the stop sleeve to prevent the inner rod from slipping out of the inner cavity of the outer rod.

10. A lawn mower, comprising a lawn mower body, characterized in that: The lawn mower further comprises a telescopic rod structure as described in any one of claims 1 to 9 above, wherein the bottom end of the outer rod is fixedly mounted on the lawn mower body, and the switch assembly is electrically connected to a controller in the lawn mower body for controlling the start of the mowing motor.

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